Twitter CEO Jack Dorsey recently said he believes bitcoin will become the single global currency, something that Apple co-founder Steve Wozniak hopes will happen.

“I buy into what Jack Dorsey says, not that I necessarily believe it’s going to happen, but because I want it to be that way, that is so pure thinking,” Wozniak told CNBC on Monday.

Wozniak bought bitcoin when it was $700, over $6,700 less than where the cryptocurrency was trading on Monday, according to data from CoinDesk.

He recently sold all but one bitcoin, saying that he only wanted to experiment with the technology and not be an investor. “The Woz,” as he is often affectionately referred to, also owns two ether, the cryptocurrency associated with the Ethereum blockchain platform.

While Wozniak said that he may not necessarily believe what Dorsey predicted, he still called bitcoin “pure.”